ATM挖钞机构动力学仿真分析

发布时间：2018-03-21 05:34

本文选题：挖钞机构　切入点：动力学仿真　出处：《东北大学》2011年硕士论文　论文类型：学位论文

【摘要】：自动柔性材料处理机械在各个领域的应用非常广泛,从打印机、复印机等办公设备的取纸和送纸机构,到面料的自动化处理,再到点钞机、自动取款机的挖钞和送钞机构等。特别是自动取款机在出钞的时候可能会出现卡钞、叠钞和钞票撕裂等故障。因此,合理设计挖钞和送钞机构,保证纸币运送的平稳可靠已经成为自动取款机设计的当务之急。本文根据自动取款机挖钞机构中纸币和捻钞轮、剥离轮、导向轮间的相互作用力来推导出纸币的运动方程式,其中用修正后的库伦摩擦力来代替纸币和各个滚轮之间的接触力。文中把挖钞过程分为捻钞、粘连纸币剥离和进钞三个阶段,并对三个阶段分别建立相应的力学模型。本文对建立的各个阶段的力学模型,利用MATLAB程序编写相应的程序来模数值拟捻钞阶段中捻钞轮转速和正压力对捻钞成功率的影响、粘连纸币剥离阶段中剥离轮转矩和正压力对两张粘连纸币和单张纸币剥离的影响、进钞阶段中导向轮转动惯量和其与纸币间动摩擦系数以及正压力对进钞的影响,得到了相关参数的影响曲线和优化参数。本文利用多体动力学软件RecurDyn中媒体传送模块(MTT2D/3D)对挖钞机构中挖钞过程的三个阶段进行了不同工况下的动力学仿真分析,取得了相关参数对纸币运行动态的影响,并与数值得到的数据进行比较,验证了所建立理论模型的准确性。
[Abstract]:Automatic flexible material processing machines are widely used in various fields, ranging from paper fetching and feeding mechanisms of office equipment such as printers, photocopiers, to automatic processing of fabrics, to money counting machines. ATM banknote digging and delivery institutions, etc., especially ATMs may have problems such as cards, folding and tearing banknotes when they issue banknotes. Therefore, the rational design of banknote digging and delivery institutions, To ensure the smooth and reliable delivery of paper money has become a top priority in ATM design. In this paper, the motion equation of banknote is deduced according to the interaction between banknote and twisting wheel, peeling wheel and guide wheel in ATM banknote digging mechanism. In this paper, the modified Coulomb friction is used to replace the contact force between banknotes and rollers. In this paper, the process of banknote digging is divided into three stages: twisting, adhesion, stripping and entering, and the corresponding mechanical models are established for each of the three stages. In this paper, a MATLAB program is used to simulate the effect of rotational speed and positive pressure of twisting wheel on the success rate of twisting banknote. The effect of torque and positive pressure on the peeling of two adhesive notes and single bills in the peeling stage, the moment of inertia of the guide wheel in the process of banknote entry, the dynamic friction coefficient between the two notes and the positive pressure on the banknote entry. The influence curves and optimization parameters are obtained. In this paper, the media transfer module (MTT2D / 3D) of multi-body dynamics software RecurDyn is used to simulate and analyze the three stages of banknote digging process in a banknote digging mechanism under different operating conditions, and the influence of relevant parameters on the running dynamics of banknotes is obtained. Compared with the numerical data, the accuracy of the theoretical model is verified.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH693

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